Simultaneous Nadir Overpasses (SNOs) between FY3D and TERRA
TLE Epoch: 2021 4 27.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 04/27/2021   15:02:45   (  69.87, -46.39) 04/27/2021   15:03:57  (  69.79, -46.00)   17.61                72
 04/27/2021   15:53:23   ( -69.59, 121.34) 04/27/2021   15:53:29  ( -69.56, 121.33)    3.49                 6
 04/27/2021   16:44:06   (  69.44, -71.14) 04/27/2021   16:42:56  (  69.45, -71.16)    1.57                70
 04/30/2021   07:19:09   (  70.10,  69.19) 04/30/2021   07:20:20  (  69.99,  70.17)   39.19                71
 04/30/2021   08:09:43   ( -69.61,-122.75) 04/30/2021   08:09:55  ( -69.60,-122.73)    1.21                12
 04/30/2021   09:00:26   (  69.47,  44.77) 04/30/2021   08:59:22  (  69.50,  44.77)    3.47                64
 05/02/2021   23:35:34   (  70.39,-175.33) 05/02/2021   23:36:42  (  70.25,-173.58)   67.11                68
 05/03/2021   00:26:03   ( -69.64,  -6.85) 05/03/2021   00:26:21  ( -69.65,  -6.79)    2.51                18
 05/03/2021   01:16:46   (  69.49, 160.67) 05/03/2021   01:15:49  (  69.48, 160.63)    2.00                57
 05/05/2021   15:51:58   (  70.63, -59.77) 05/05/2021   15:53:04  (  70.50, -57.34)   91.16                66
 05/05/2021   16:42:22   ( -69.61, 109.12) 05/05/2021   16:42:48  ( -69.63, 109.06)    2.79                26
 05/05/2021   17:33:06   (  69.52, -83.44) 05/05/2021   17:32:15  (  69.51, -83.45)    1.10                51
 05/08/2021   08:58:41   ( -69.64,-134.99) 05/08/2021   08:59:13  ( -69.65,-135.02)    1.86                32
 05/08/2021   09:49:25   (  69.55,  32.46) 05/08/2021   09:48:40  (  69.54,  32.46)    1.52                45
 05/11/2021   01:15:01   ( -69.67, -19.10) 05/11/2021   01:15:39  ( -69.67, -19.12)    0.76                38
 05/11/2021   02:05:45   (  69.58, 148.35) 05/11/2021   02:05:06  (  69.55, 148.37)    3.09                39